import 'package:flutter/material.dart';
import 'package:flutter_stock_analyze/http.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // TRY THIS: Try running your application with "flutter run". You'll see
        // the application has a purple toolbar. Then, without quitting the app,
        // try changing the seedColor in the colorScheme below to Colors.green
        // and then invoke "hot reload" (save your changes or press the "hot
        // reload" button in a Flutter-supported IDE, or press "r" if you used
        // the command line to start the app).
        //
        // Notice that the counter didn't reset back to zero; the application
        // state is not lost during the reload. To reset the state, use hot
        // restart instead.
        //
        // This works for code too, not just values: Most code changes can be
        // tested with just a hot reload.
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: const MyHomePage(title: '股票分析工具'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String result = "";
  String period = "daily";
  String adjust = "qfq";

  final TextEditingController _codeController = TextEditingController();
  fetchData() async {
    print("fetchData");
    var result = await Http(
      context,
    ).fetchAnalysis(_codeController.text, period, adjust);
    setState(() {
      this.result = result;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Column(
        children: <Widget>[
          Padding(
            padding: const EdgeInsets.all(32),
            child: Row(
              children: [
                Expanded(
                  child: TextFormField(
                    decoration: const InputDecoration(
                      border: OutlineInputBorder(),
                      labelText: '股票代码',
                    ),
                    controller: _codeController,
                  ),
                ),
                Row(
                  children: [
                    const Text("周期："),
                    DropdownButton<String>(
                      value: period,
                      onChanged: (String? period) {
                        setState(() {
                          this.period = period ?? "daily";
                        });
                      },
                      items: [
                        DropdownMenuItem<String>(
                          value: 'daily',
                          child: Text('日'),
                        ),
                        DropdownMenuItem<String>(
                          value: 'weekly',
                          child: Text('周'),
                        ),
                        DropdownMenuItem<String>(
                          value: 'monthly',
                          child: Text('月'),
                        ),
                      ],
                    ),
                    const Text("数据复权："),
                    DropdownButton<String>(
                      value: adjust,
                      onChanged: (String? adjust) {
                        setState(() {
                          this.adjust = adjust ?? "";
                        });
                      },
                      items: [
                        DropdownMenuItem<String>(value: '', child: Text('不复权')),
                        DropdownMenuItem<String>(
                          value: 'qfq',
                          child: Text('前复权'),
                        ),
                        DropdownMenuItem<String>(
                          value: 'hfq',
                          child: Text('后复权'),
                        ),
                      ],
                    ),
                  ],
                ),
                SizedBox(
                  width: 200,
                  child: ElevatedButton(
                    onPressed: () {
                      setState(() {
                        result = "[${_codeController.text}]正在分析中...\n";
                      });
                      fetchData();
                    },
                    child: const Text('开始分析'),
                  ),
                ),
              ],
            ),
          ),
          Expanded(
            child: Padding(
              padding: EdgeInsetsGeometry.all(32),
              child: SingleChildScrollView(child: Text(result)),
            ),
          ),
        ],
      ),
    );
  }
}
